Pump



E. A. CULBERTSON.

PUMP.

APPLICATION FILED Dsc. I2. |921.

Patented Oct. 31, 11922.

atented ct. 31, 1922.

STATES EDWARD A. CULBERTSON, OF WICHITA, KANSAS.

ruivrn Application led December 12, 1921. i Serial No.` 521,731.

To all whom t may conce/Mt: j j Be it known that I, EDWARD A. Cunnnn'r-` soN, a citizen of the United States, residing at l/Vichita, inthe county of Sedgwickand State of Kansas, have invented a certain new and useful Improvement in Pumpsof which the following is a specification.

My invention relates to improvements pumps.

It is particularly well adapted for use in pumping water or oil from deep wells, and is of the type in which the pump barrel is located adjacent to the bottom of the well, and in which the piston reciprocates inthe pump barrel and is lifted by a krod or rods joined together and extending to the surface of the ground. j v y One of the objects of my invention is to reduce to a minimum the pressure against the lower end ofthe piston when the latter descends, thereby elimina-ting jerking and buckling of the rod and increasing the capacity of the pump. j

A further object of my invention 1s to provide a maximum capacity of pump casing with a minimum cross sectional area, and which has a substantially smooth cylindrical form devoid of large laterally extending projecting pipes or portions.

Still another objectof my invention is to provide a novel arrangement of checlrvalves which permits of a minimum diameter of casing.

A further object provide a chamber at the bottom of the casing for the reception of sediment, so that the latter will not clog or interfere with the proper operation of the standing intake valve.

rIhe novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawing which illustrates the preferred embodiment of my invention, j

Fig. 1 is a central vertical sectional View of my improved pump. A j

Fig. 2 is an enlarged cross section on the line 2..-2 of Fig. 1.

Fig. 3 is an enlarged cross section on the line 3-3 ofFig. 1. j

Fig. 4 is an enlarged cross section on the `,line 4-4 of Fig. 1. j

Similar reference characters designate similar parts in the different views. l In the form shown in the drawing, the casing comprises the following described parts. The lowerend of the casing is provided with a coupling 1 having a threaded upper end in which 1s fitted the lower end of a pipe 2, the upper end of which has threaded engagement with the lower end of an intermediate section 3, preferably a casting, the upper end of which has threaded engage` ment with the lower end of a pipe 4, the upper end of which has threaded engagement with the lower end of a coupling 5, the upper end of which is adapted to have threaded engagement with the lower end of piping 6, which extends to the surface of the ground.

The lower end 0f the coupling 1 is adapted to have threaded engagement with the upper end of piping 7 which extends to and rests onthe bottom of the well.

A vertical pipe 8 has its lower end fitted in the threaded lower end of the coupling 1 and extends upwardly in `and is spaced apart from the pipe2, and which forms with the pipe Zand coupling 1 a chamber for the reception of sediment.

The intermediate section 3 of the casing is provided with a longitudinal partition 9,

theuipper and lower ends ofrwhich are.

enlarged .and respectively connect with opj posite inner walls of the section 3.

of my invention is to The pipe `8 serves as an inlet passage for the casing and has mounted on its upper end the casing 10 of a standing intake checky valve provided with an upwardly opening ball valve 11. 1

j A vertical pump barrel 12 is mounted centrally in and spaced apart from thepipe 4 and has its lower end fitted in a threaded hole in thel upper end of the .partition 9. The upper end ofthe barrel 12 is fitted be i tween internal lugs13 in thecoupling'.

The partition 9 forms in the section 3 two longitudinal passages 14 and 15, the passage 14 communicating at `its upper end with the lower end of the pump barrel 12 and its lower `end communicatingwith the interior of the pipe 2. The space 16 between thek pump-barrel 12 and the pipe 4 and coupling 5 communicates at its upper end with the upper end of the pump barrel 12. The kspace 16 at its lower end communicates with the upper end of the passage 15. The lower gend of the passage y15 is threaded and has The lower end ofthe casing 17 is provided with a socket 19 adapted to receive a vwrench for screwing the casing into or re,-

moving it from its operative position. The side walls of the casing 17 is provided ywith perforations 2O which communicate withA the interior of the pipe 2.

The perforations 20, longitudinal opening through the casing 17, passage 15 and spaces 16 form a by-pass, which at its upper end communicates with the upper end of the pump barrel 12, and which at its lower end, through the intermediacy of the pipe 2 and passage 14,'communicates with the lower end of the pump barrel 12.

Reciprocative in the pump barrel 12 is a piston 21,`the upper end of vwhich is attached to the lower end of an operating rod',

or series of jointed rods, 22, which extends through the piping 6 to the surface of the ground, where the rodis connected to and operated byany usual type of pump operating means, not shown, by which the rod and piston and the column of oil or water carried by the piston are lifted.

The `piston 21 vis provided therethrough with a longitudinal port 23 adapted to be closed by an'upwardly opening ball check valve 24. i

In the operation of the pump, when the piston ascends, liquid will be drawn by suction upwardly through the piping 7, pipe 8, and past the valve 11 into the pipe`2, and the column of liquid on'the piston 21 will be lifted. 4

WhenY the piston descends, the valve 11 will be closed and the valve 24 will'v be opened. and liquid will pass upwardly 'into the barrel 12y above the piston21 throughthe port 23. vThe sudden descent of the piston would, ordinarily, b e resisted by the liquid below the piston, due to the resistance offered to the passage of liquid through, the relatively small port 28. In myimproved construction, the piston in descending will force liquid below it out ofthe passage 14 and pipe 2 through' the perforation .20, thence upwardly 'through the valve casing 17, past the valve 18, thence through the passage 15, and space 16, into theupper end of the pump barrel 12,. l

In `order to reduce to a minimum, the resistance odered bythe liopiid"againstl the downward movement of the piston, the smallest cross sectional area or effective opening in the by-pass is substantially as great as the cross sectional area` of the piston 21, outside ofv the port 23. By means ofthis construction, the effective cross sectional area of the by-pass andof the port 23.. is substantially as great as the crossfsectional area of the inside of the pump barrel 12. The piston will, therefore, be dropped freely through the pumpbarrel to the lower end of its descending stroke.

Bending `or buckling-of the rod 22 is thus prevented, the piston will drop with maximum speed and a maximum of pumping capacity will be afforded.

It willfbe noted that the three check valves 11, 18 and 211 are located in substantial verticall alinement with` each other. By means of this arrangement, a' minimum of diameter and a maximum of capacity is obtained. The casing is substantially cylindri'cal'and is devoid of large lateral projectionsand of external piping,

This construction also affords cheapness in manufacture', strength, and a construction which is not liable to, get out of` order.

YI do not limit my invention to the structure shown and described, as many modifications, within the scope of the appended claims, may be made without departing from the spiritof my invention. Y

vlVhat I claim is 1. In a pump of' the kind described,`an outer vertical casing having an intermediate section provided with twio longitudinal passages,`a pump barrel having its lower end fitted in and communicating with one of said passages, a check valve having a casing'itted in and communicating with the other of said passages, the last named passage from said check valve communicating at *all times with said pump barrel at the upper end thereof, an intakestanding check valve in said casingbelow said two passages, and a piston reciprocative in said barrel, substantially as set forth,

2. In apurnp ofthe kind described, an outer vertical casing having an intermediate section provided with two longitudinal passages, the upper end of one of said passages being screw-threaded, a verticalpump barrel having its lower end fitted in said threaded passage, theA lower end of the other passage being rscrew-threaded, a check valve having a valve casing-fitted in the threaded end of said last named passage, said last named passage communicating with the upper yend 'of saidpump barrel, and an intake standing check valve/in said casing below said two passages, and a piston reciprocative in said barrel and having a longitudinal port and a check valve controlling said port, substantially as set forth. 4

3. In a pump of the kind described, a vertical pump casing adapted to be inserted in a well casing, a standing intake check valve in said pump casing, a vertical pump barrel in said pump casing, the pump Acasing having within it a b y-pass `which communicates at its ends respectively with the pump barrel, a piston reciprocative in the pump barrel between the ends of 'said by-pass, and a check valve in said by-pass, theby-pass in said pump easing, a vertical pump barrel` in said pump easing, the pump casing having Within it a bv-pass which communicates at its ends respectively with the pump barrel, a piston reeiprocative in the pump barrel between the ends of said by-pass, the piston having; a longitudinal port and a Check valve controlling said port, and a cheek valve in said by-pass, the by-pass 'from the cheek valve in the bv-pass being the pump barrel above the piston, substantially as set forth.

ln testimony whereof I have signed my name to this specification.

EDWARD A. GULBERTSON.

at all times in open communication with 

